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US-12620716-B2 - Antenna structure

US12620716B2US 12620716 B2US12620716 B2US 12620716B2US-12620716-B2

Abstract

An antenna structure includes a ground element, a feeding radiation element, a first radiation element, a second radiation element, a third radiation element, a shorting radiation element, and a carrier element. The ground element includes a protruding portion. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the first radiation element. The second radiation element is adjacent to the protruding portion of the ground element. The first radiation element and the second radiation element substantially extend in opposite directions. The third radiation element is coupled to the feeding radiation element. The third radiation element is adjacent to the first radiation element. The third radiation element is also coupled through the shorting radiation element to the ground element.

Inventors

  • Chun-I Cheng
  • Chung-Ting Hung
  • Chin-Lung Tsai
  • Ying-Cong Deng

Assignees

  • QUANTA COMPUTER INC.

Dates

Publication Date
20260505
Application Date
20241023
Priority Date
20240827

Claims (10)

  1. 1 . An antenna structure, comprising: a ground element, comprising a protruding portion; a feeding radiation element, having a feeding point; a first radiation element, coupled to the feeding radiation element; a second radiation element, coupled to the first radiation element, wherein the second radiation element is adjacent to the protruding portion of the ground element, and the first radiation element and the second radiation element substantially extend in opposite directions; a third radiation element, coupled to the feeding radiation element, wherein the third radiation element is adjacent to the first radiation element; a shorting radiation element, wherein the third radiation element is further coupled through the shorting radiation element to the ground element; and a carrier element, wherein the ground element, the feeding radiation element, the first radiation element, the second radiation element, the third radiation element, and the shorting radiation element are disposed on the carrier element.
  2. 2 . The antenna structure as claimed in claim 1 , wherein the protruding portion of the ground element substantially has a rectangular shape.
  3. 3 . The antenna structure as claimed in claim 1 , wherein a combination of the feeding radiation element, the first radiation element, and the second radiation element substantially has a T-shape.
  4. 4 . The antenna structure as claimed in claim 1 , wherein a width of the first radiation element is greater than that of the second radiation element.
  5. 5 . The antenna structure as claimed in claim 1 , wherein a first coupling gap is formed between the protruding portion of the ground element and the second radiation element, and a width of the first coupling gap is from 0.5 mm to 1 mm.
  6. 6 . The antenna structure as claimed in claim 1 , wherein a second coupling gap is formed between the first radiation element and the third radiation element, and a width of the second coupling gap is from 0.75 mm to 1.5 mm.
  7. 7 . The antenna structure as claimed in claim 1 , wherein the antenna structure covers a first frequency band and a second frequency band, the first frequency band is from 2400 MHz to 2500 MHz, and the second frequency band is from 5150 MHz to 5850 MHz.
  8. 8 . The antenna structure as claimed in claim 7 , wherein a length of the first radiation element is substantially equal to 0.25 wavelength of the first frequency band.
  9. 9 . The antenna structure as claimed in claim 7 , wherein a length of the second radiation element is substantially equal to 0.25 wavelength of the second frequency band.
  10. 10 . The antenna structure as claimed in claim 7 , wherein a length of the third radiation element is substantially equal to 0.5 wavelength of the second frequency band.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority of Taiwan Patent Application No. 113209247 filed on Aug. 27, 2024, the entirety of which is incorporated by reference herein. BACKGROUND OF THE INVENTION Field of the Invention The disclosure generally relates to an antenna structure, and more particularly, to a wideband antenna structure. Description of the Related Art With the advancements being made in mobile communication technology, mobile devices such as portable computers, mobile phones, multimedia players, and other hybrid functional portable electronic devices have become more common. To satisfy consumer demand, mobile devices can usually perform wireless communication functions. Some devices cover a large wireless communication area; these include mobile phones using 2G, 3G, and LTE (Long Term Evolution) systems and using frequency bands of 700 MHz, 850 MHz, 900 MHz, 1800 MHz, 1900 MHz, 2100 MHz, 2300 MHz, and 2500 MHz. Some devices cover a small wireless communication area; these include mobile phones using Wi-Fi systems and using frequency bands of 2.4 GHz, 5.2 GHz, and 5.8 GHz. Antennas are indispensable elements for wireless communication. If an antenna for signal reception and transmission has an insufficient operational bandwidth, it may degrade the communication quality of the relative mobile device. Accordingly, it has become a critical challenge for designers to design a small-size, wideband antenna structure. BRIEF SUMMARY OF THE INVENTION In an exemplary embodiment, the invention is directed to an antenna structure that includes a ground element, a feeding radiation element, a first radiation element, a second radiation element, a third radiation element, a shorting radiation element, and a carrier element. The ground element includes a protruding portion. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the first radiation element. The second radiation element is adjacent to the protruding portion of the ground element. The first radiation element and the second radiation element substantially extend in opposite directions. The third radiation element is coupled to the feeding radiation element. The third radiation element is adjacent to the first radiation element. The third radiation element is also coupled through the shorting radiation element to the ground element. The ground element, the feeding radiation element, the first radiation element, the second radiation element, the third radiation element, and the shorting radiation element are disposed on the carrier element. In some embodiments, the protruding portion of the ground element substantially has a rectangular shape. In some embodiments, the combination of the feeding radiation element, the first radiation element, and the second radiation element substantially has a T-shape. In some embodiments, the width of the first radiation element is greater than the width of the second radiation element. In some embodiments, a first coupling gap is formed between the protruding portion of the ground element and the second radiation element. The width of the first coupling gap is from 0.5 mm to 1 mm. In some embodiments, a second coupling gap is formed between the first radiation element and the third radiation element. The width of the second coupling gap is from 0.75 mm to 1.5 mm. In some embodiments, the antenna structure covers a first frequency band and a second frequency band. The first frequency band is from 2400 MHz to 2500 MHz. The second frequency band is from 5150 MHz to 5850 MHz. In some embodiments, the length of the first radiation element is substantially equal to 0.25 wavelength of the first frequency band. In some embodiments, the length of the second radiation element is substantially equal to 0.25 wavelength of the second frequency band. In some embodiments, the length of the third radiation element is substantially equal to 0.5 wavelength of the second frequency band. BRIEF DESCRIPTION OF DRAWINGS The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: FIG. 1 is a flat expansion view of an antenna structure according to an embodiment of the invention; FIG. 2 is a diagram of VSWR (Voltage Standing Wave Ratio) of an antenna structure according to an embodiment of the invention; FIG. 3A is a perspective view of a POS (Point of Sale) system according to an embodiment of the invention; and FIG. 3B is a partial view of a POS system according to an embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION In order to illustrate the purposes, features and advantages of the invention, the embodiments and figures of the invention are shown in detail as follows. Certain terms are used throughout the description and following claims to refer to particular components. As one